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  • mysql circular dependency in foreign key constraints

    - by Flavius
    Given the schema: What I need is having every user_identities.belongs_to reference an users.id. At the same time, every users has a primary_identity as shown in the picture. However when I try to add this reference with ON DELETE NO ACTION ON UPDATE NO ACTION, MySQL says #1452 - Cannot add or update a child row: a foreign key constraint fails (yap.#sql-a3b_1bf, CONSTRAINT #sql-a3b_1bf_ibfk_1 FOREIGN KEY (belongs_to) REFERENCES users (id) ON DELETE NO ACTION ON UPDATE NO ACTION) I suspect this is due to the circular dependency, but how could I solve it (and maintain referential integrity)?

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  • Why is my visual studio 2008 project read-only

    - by Richard
    I'm working on a project for school, we use visual studio 2008 there and I use it at home, both are express edition. The project in question I started at school, but I cannot edit it at home, when I open the .sln I get this "The IntelliSense information will not be available for .VC++ projects because the Intellisense database file Location/Junk.ncb could not be opened for writing. Other features will also be affected if the solution directory is read-only." How do I open my project so that I can edit it?

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  • Confusing of TTimeSpan usage in Delphi 2010

    - by stanleyxu2005
    Hi All, I tried the new Record type TTimeSpan in Delphi 2010. But I encourage a very strange problem. assert(TTimeSpan.FromMilliseconds(5000).Milliseconds == 5000); This assertion does not pass. The value of 'TTimeSpan.FromMilliseconds(5000).Milliseconds' is always 0. I really cannot explain.

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  • Read file as its being uploaded

    - by zaf
    By default you cannot access a file that is uploaded until it has been fully transferred to the server. What is the best way to get round this and be able to access the 'byte stream' as the file upload is in progress?

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  • mod_rewrite params inversion

    - by Fernando Constantino
    How can I create the mod_rewrite rule so I can convert the following URLs: From: domain/something/param/action ex:domain/cities/Chicago/view to: domain/something/action.php?param1=param ex: domain/cities/view.php?city=Chicago Changing to cities/view/Chicago cannot be an alternative. Thanks in advance.

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  • rewrite all requests from one folder to a parent folder htaccess

    - by Neo
    This one has me stumped, I need to re-write all requests to the javascript folder (js) to a special library handler system. e.g. rewrite http://localhost/admin/js/bar.js --> http://localhost/_lib/=admin/js/bar.js Any ideas? I have tried the following which creates an error RewriteCond %{REQUEST_URI} ^(.*)$ RewriteRule ^(.*)$ /%1/_lib/$1 [NC] (36)File name to long: cannot map GET /admin/js/bar.js to file

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  • Why is Visual Basic used?

    - by Arrieta
    I don't mean to start a holy war here, but I cannot fathom why would anybody use Visual Basic for a new project. Can you explain me why is it used? What new applications (which a lay person may be familiar with) have been developed in it? Why is it chosen over other languages? Thanks.

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  • Underlining RichTextArea content by default in Silverlight 4

    - by Rahul N
    I'm uisng a RichTextArea to display my html content in SL 4,I want to underline the content displayed by the control ( without modifying the html) and also attach an event of Onclick on the text . I tried different options i.e using RichTextArea in the content template of a Hyperlinkbutton but as the content of RichTextArea cannot be set directly, this was ruled out. Any suggestions ?

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  • mysql delete and foreign key constraint

    - by user121196
    I'm deleting selected rows from both table in MYSQL, the two tables have foreign keys. delete d,b from A as b inner join B as d on b.bid=d.bid where b.name like '%xxxx%'; MYSQL complains about foreign keys even though I'm trying to delete from both tables: Error: Cannot delete or update a parent row: a foreign key constraint fails (yyy/d, CONSTRAINT fk_d_bid FOREIGN KEY (bid) REFERENCES b (bid) ON DELETE NO ACTION ON UPDATE NO ACTION) what's the best solution here to delete from both table?

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  • Where is the action listener registered?

    - by Summer_More_More_Tea
    Hi there: I come across this problem when referring a piece of javascript code: <a href="javascript:void(0);"><!-- other html elements --></a> It want to register a mouse click event listener on this anchor, but I cannot find which function is registered. What's more, what does the code href="javascript:void(0);" mean? Thanks in advance!

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  • tumblr.com-like uneditable text value

    - by cutty
    Hello, Im looking a way to create a text input that has content set as its value, but when selected cannot be change, only have a value added to it. The perfect example is at tumblr.com the third input down shows a text input whos default value is ".tumblr.com" on focus you can add your subdomain to it. Thanks!

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  • jquery adding new class aconfiguration on id?

    - by dupdup
    <area shape="poly" coords="63,10,64,38,89,37,91,10" class={"strokeColor:'0000ff',strokeWidth:5, fillColor:'ff0000',fillOpacity:0.6}" href="#" id="x1"> There is a imagemap in my html and I want to dynamicly add a new configuration "alwaysOn:true" to the class attribute. $("#x1").click(function(){alert(8);}) I am newbea I can add click listener to it but cannot figure out how to add config option How can I do that with jquery?

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  • .htaccess not load css file and images and duplicate parent url?

    - by Mahran Elneel
    i have create htaccess and cannot load css file and images but when add ../file.css and images ../ima it work but i want to open in current directory. and when click the link in home page like will be http://localhost/mysite/program/4 but in another page will add http://localhost/mysite/program/program/2 and this wrong location the .htaccess code Options +FollowSymLinks RewriteEngine On # Turn on the rewriting engine RewriteRule ^program/([0-9]+)/?$ get_programs.php?pack_id=$1 [NC,L] RewriteRule ^El-Mensajero/?$ home.php [NC,L] RewriteRule ^Daily-Tours/?$ daily_tours.php [NC,L] RewriteRule ^page/([0-9]+)/?$ get_pages.php?page_id=$1 [NC,L]

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  • Adding to the schema of a subscribing database.

    - by NTDLS
    Transactional Replication on SQL Server 2005 Enterprise x64 (SP3). I need to add check constraints to a databases that is the target for a replication, but I cannot add the check constraints to the publishing database. The Problem is that the replication process keeps removing my constraints. How do I prevent this?

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  • (gcc) Multi-Dim Array or Double Pointer for Warning-free Compile

    - by paul simmons
    Hi, I have a function, which is called sometimes with regular, sometimes dynamic arrays. If I define the function as function_name(int[10][10] a) and send int** as a parameter, I get a warning. Opposite, if I declare function_name(int** a) and send int[][] as a parameter (after casting) I cannot access to array elements inside function. What is the correctest way?

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  • ado.net data entity problem

    - by ognjenb
    I have this error Cannot implicitly convert type 'System.Linq.IQueryable' to 'Mvc.Models.engineer'. An explicit conversion exists (are you missing a cast?) after write this code engineer Ing = new engineer(); Ing = from j in testPersons.ibekoengineer select j.Name; What is wrong?

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  • SSIS (missing) Pre-Build and Post-Build

    - by Raj More
    For the warehouse work under progress, we have a single solution with multiple projects in it OLTP Database Project Warehouse Database Project SSIS ETL project After the SSIS project is built, I want to move the binaries (XML, really) from the Bin folder to "C:\AutomatedTasks\ETL.Warehouse\" and "C:\AutomatedTasks\ETL" I cannot find the Post-Build events to do that for the SSIS project. Where are they? If they aren't available, how do I achieve this?

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  • Is It Possible To Cast A Range

    - by Brad Rhoads
    I'd like to do something like this: def results = Item.findAll("from Item c, Tag b, ItemTag a where c = a.item and b = a.tag and (b.tag like :q or c.uri like :q) " + ob,[q:q]) def items = (Item) results[0..1][0] but I get Cannot cast object '[Ljava.lang.Object;@1e224a5' with class '[Ljava.lang.Object;' to class 'org.maflt.ibidem.Item' I can get what I need with this, but it doesn't seem like it's the best solution: def items = [] as Set def cnt = results.size() for (i=0;i<cnt-1;i++) { items << results[i][0] } items = items as List

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  • Save list of CGPoints using NSUserDefaults

    - by Chris Daviduik
    I have a bunch of CGPoints from a CCTMXLayer I want to save to NSUserDefaults but cannot seem to figure out an elegant way of doing so. Originally I was hoping to save an NSDictionary with an NSMutableSet for a value containing several NSValues (valueWithCGPoint). From what I can tell neither NSMutableSet or NSValue is supported by NSUserDefaults. At this point I am considering saving the x&y values of the CGPoint as a string and just converting it back and forth as needed.

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  • Understanding java's native threads and the jvm

    - by Moev4
    I understand that the jvm is itself an application that turns the bytecode of the java executable into native machine code, but when using native threads I have some questions that I just cannot seem to answer. Does every thread create their own instance of the jvm to handle their particular execution? If not then does the jvm have to have some way to schedule which thread it will handle next, if so wouldn't this render the multi-threaded nature of java useless since only one thread can be ran at a time?

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  • Possible to lock attribute write access by Doors User?

    - by Philip Nguyen
    Is it possible to programmatically lock certain attributes based on the user? So certain attributes can be written to by User2 and certain attributes cannot be written to by User2. However, User1 may have write access to all attributes. What is the most efficient way of accomplishing this? I have to worry about not taking up too many computational resources, as I would like this to be able to work on quite large modules.

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